Pump with permeable piston for multiple purposes



1. E. LARCHE.

PUMP WITH PERMEABLE PISTON FOR MULTIPLE PURPOSES.

APPLlCATlON FILED MAR.29,19I9.

1,41 0,530. Patented Mar- 21, 1922.

Fig .I

Inventor by I L1], 5. awn I .jttorney.

hi i

LIL-:1]

JEAN ETIENNE LARCHE, OF PARIS, FRANCE.

PUMP WITH PERMEABLE PISTON FOR MULTIPLE PUBJFQSE S.

Application filed March 29, 1919.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921,

To all whom it may concern:

Be it known that I, JEAN ETIENNE LARoHfi, a British subject, residing atLariboisiere Hospital, Rue Ambroise Par, Paris, Seine, France, haveinvented a certain new and useful Pump with Permeable Piston forMultiple Purposes, (for which I have filed applications in Great BritainAu 6, 1918, Patent Numberl25,050, and in rance Apr. 3, 1918, PatentNumber 489,539,) and of which the following is a specification.

The present invention has for its object a pump with permeable pistoncapable of being utilized in medicine and in surgery for numerousapplications.

This apparatus is essentially characterized by the combination with asyringe having a permeable piston of aparticular arrangement of cocksmounted the one upon the boss of the injection tube, the other upon thepiston rod, the operating handles of these cocks being provided in suchmanner that the opening or the closure of each of the cocks is obtainedby a natural movement of the hand of the operator.

The pump is also characterized by details which will hereafter bedescribed.

In the accompanying drawing there is represented one constructionaccording to the present invention.

Figure 1 is an elevation in partial longitudinal section, the cooksbeing in the pOsition which corresponds to the suction.

Figure 2 is a section similar to that of Figure 1, the cocks being inthe reverse position, while Figure 3 is a view in detail showing anadditional arrangement capable of being mounted upon the boss ofthe pumpin certain particular cases.

In the construction represented in the drawing, the apparatus isprovided partly in metal, partly in glass, but it is to be understoodthat according to requirements other materials may be used.

As is to be seen upon the drawing the body or the injection tube of thepump is formed of a tube of glass 1 and of a metallic casing of knownconstruction formed of two ends 2 and 3 connected by strips of metal 4.The end 2 is extended to form a boss which carries one of the cooks 6.The end 3 allows of passage through it of Specification of LettersEatent.

Patented Iiiar. 21, 1922. Serial No. 285,998.

41 STAT. It, 1313.)

the rod 7 of the piston 8. The joint between the rod 7 and the end 3 isrendered perfectly air tight by any appropriate means for preventingpenetration at that position in th body of the syringe of air chargedwith impurities while the piston is displaced in the direction of thearrow F (Figure 2) the entry of the air in this part of the syringe iseffected by a casing 9 fixed upon the end 3 or formed integral with itand containing a substance 10 (impregnated cotton wool for example) forthe filtration of the air.

Upon the rod 7 of the piston is mounted the second cook 11; the rod isprolonged by a nipple 12 adapted to receive a rubber tube.

-In the construction illustrated the piston is formed as a metallic body8 upon which is mounted a ring of rubber 8' assuring tightness but apiston may be used entirely of metal, glass or any other material.

The operation of the cock 6 is effected by means of a jointed systemformed of the two rods 13 and 14 and of the pivoted ring 15 in which mayengage the thumb of one hand of the operator. On the under side of thesyringe and in the same plane as the ring 15 is fixed a ring 16 as asecond point of support for the hand, one or more of the fingers of thehand passing through the ring 16 while the thumb passes through the ring15. v

The cook 11 of the piston rod is operated by the other hand of theoperator by means oi" the ring 17; another fixed ring 18 is mountedbeneath and upon the rod in substantially the same plane as thering 17.

As a second point of support for the hand one or more of the fingers ofthe hand passes through the ring 18 and the thumb through the ring 17.Thus the pump may be operated by being held by the operator at itsrespective ends, the rings 15 and 17 being easily moved by the thumbswhile the pump is supported in the hands, and by one or more of thefingers of each hand passing through the rings 16 and 18 in the mannerdescribed.

The cock 6 is mounted in such manner that its opening is eiiected whilethe ring 15 moves from the position of Figure 2 to that of Figure 1,that is to say in moving it towards the body of the pump. The opening ofthe cook 11 is efiected by oper- 1 L. a i.

ation away from the body of the pump: Figure 1 indicates the closedposition of the cock ll and Figure 2 its open position.

It is to be observed that these movements of the rings of the cookscorrespond to the movements that the hands of the operator make quitenaturally in the use of the ap paratus: in the case of suction throughthe boss 5, it is necessary to maintain the body of the pump to resistthe ellort exercised upon the piston in its displacement in thedirection of the arrow F (Figure 1). For this operation the cock 11should be closed.

On the contrary, when it is desired to compress through the piston rod7, a liquid contained in the pump, the cock 6 should be closed and thecock 11 open. For this operation the ring 15 occupies the position ofFigure 2 to afford to the operator an effective point of supporttogether with the ring 16. I

The pump presenting the characteristics described finds its applicationin numerous cases. It permits especially:

1. The evacuation of any collection of pathological liquid by suction atone side and compression at the other.

2. The transfusion of blood;

3. Intravenous injections of serum.

The boss 5 can receive in known manner a rubber tube, at the extremityof which is mounted a needle. For certain operations one can mount uponthe boss 5 as indicated in Figure 3 a casing 19 similar to the easing 9which has been referred to above, and filled similarly with a suitablematerial to filter a gas. This arrangement is utilized when it isdesired to inject a gas into a cavity.

Upon the boss 5 laterally a fitting 20 may be disposed (seeFigrn-e 3)permitting es- 'cape of a globule admitted by accident into septicliquid in case of need. can be closed, when it is not utilized, by

the apparatus, and which one does not desire to inject into the vein.,or to mount a rubber tube by which one delivers an anti- This fittingmeans of a plug 21.

The pump just described can be utilized as a syringe or ordinary suctionpump in leaving the cock 6 open, the cook 11 being closed, and inmanipulating the apparatus without operating the said cocks.

I claim: 7

1. In a pump closed at its respective ends and having hollow piston andpiston rod, in combination a. cock upon the outwardly protruding end ofthe piston rod. and another cock upon the pump at the end of the pumpopposite to that through which the hollow piston rod passes,substantially as described.

2' In a pump closed at its respective ends and having hollow piston andpiston rod, in combination a cock upon the outwardly protruding end ofthe piston rod, another cock upon the pump at the end of the pumpopposite to that through which the hollow piston rod passes and rings bywhich the said respective cocks may be opened and closed in the use ofthe pump, substantially as described.

3. In a pump closed at its respective ends and. having hollow piston andpiston rod, in combination a cock upon the outwardly protruding end ofthe piston rod, another cock-upon the pump at the end or" the pumpopposite to that through which the hollow piston rod passes, rings bywhich the said respective cocks may be opened and closed in the use ofthe pump, and means carried in position adjacentthe respective cocks bywhich the pump may be held and the cocks may be operated while so held,substantially as described.

4. In a pump closed at its respective ends and having hollow piston andpiston rod, in combination acock upon the outwardly protruding end oithe piston rod, another cock uponthe pump at the end of the pumpopposite to that through which the hollow piston rod passes, rings bywhich the said respective cocks may be opened and closed and rings inposition adjacent the cooks and beneath the rings last referred to bywhich the pump may be held in the hands of the operator and. the cooksoperated when so held. substantially as described 5. In a pump closed atits respective ends and hai' ing'hollow.piston and piston rod, incombination a cock upon the outwardly protruding endot the piston rod,another cock upon the pump at the end o t the pump opposite to thatthrough which the hollow piston rod passes and an air filter mountedupon the end of the pump through which the piston rod passes.substantially as de scribed. 1 s I In testimony whereof. Ihave signed myname to this specification.

JEAN ETIENNE Lancer)-

